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(No Model.) 6 Sheets-Sheet 5.

G. A. GUMPI-IERT. SHAKING GRATE.

No. 600,493. Patented Mar. 8,1898.

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(No Model.) 6 Sheets-Sheet 6.

' G. A. GUMPHERT.

SHAKING GRATB Patented Mar. 8, 1898.

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-lLhv'rn STATES ATENT FFICE.

GEORGE A. GUMPI-IERT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO THOMAS MARRIN, OF SAMEPLAOEV SHAKlNG-G RATE.

SPECIFIGAIION forming part of Letters Patent No. 600,493, dated March 8, 1898.

Application filed November 6, 1897. Serial No. 657,632. (No model.)

To coll whom it natty concern:

Be it known that I, GEORGE A. GUMPHERT, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Shaking-Grates, which improvement is fully set forth in the following specification and accompanying drawings.

My invention consists of an improved con- IO struction of shaking-grate, in which provision is made for effectively shaking every portion of the grate-surface either simultaneously or at different periods, means being provided when all the grate -sections are I 5 shaken simultaneously for rocking or oscillating adjacent slice-bars mounted on the same bearing-bar in opposite directions, and provision being also made for rocking simultaneously every other series of. slice-bars,

while the intermediate slice-bars remain stationary or serve as dead-bars.

It also consists of a novel construction of slice-bars having a curved or serpentine strengthening-rib therein and curved, sinu- 2 5 ous, or serpentine openings therethrough for the admission of air, the upper portion of the slice-bar being rounded and its sides between center and top below its top surface being provided with serrations or teeth, so that the refuse, clinkers, &c., which fall over either side of the slice-bars will be ground between each pair of adjacent bars, since when the latter are actuated simultaneously they rock or oscillate in opposite directions, especial 5 attention being called to the fact that the function of the serpentine rib above referred to is to provide the necessary strength required in reinforcing the slice-bar, so as to enable said teeth to effectivelyperform their function.

It also consists of a novel construction of side bearing-bars, end frames,and key-blocks, by means of which the sections composing the outer framework of the grate are held in assembled position without necessitatingthe employment of bolts or other extraneous fastening devices, thus rendering the grate capable of being readily and expeditiously erected without necessitating the employment of skilled labor.

It also consists of novel means for strengtheni'ng and actuating the slice-bars and supporting and locking the actuating mechanism.

It further consists of novel details of construction, all as will be hereinafter fully set forth, and particularly pointed out in the claims.

Figure 1 represents a perspective view of a shaking-grate embodying my invention,showing the different positions the slice-bars can be caused to assume by the proper manipulation of the actuating-levers. Fig. 2 represents a top plan view of the grate, showing the two intermediate or central transverse rows or series of slice-bars seen in Fig. 5 re moved and a substantially central tie-piece employed in their stead, the left-hand series of slice-bars being shown as simultaneously actuated, each adjacent pair of slice-bars being rocked in opposite directions. Fig. 8 7o represents a bottom plan View of Fig. 2. Fig.

4 represents a bottom plan view of a grate, showing especially the means for actuating or oscillating the slice-bars when the tie-piece seen in Figs. 1 and 2 is dispensed with. Fig. 7 5 represents a longitudinal section of Fig. at, the same being taken on line :0 :10 of said figure and viewed in the direction of the arrows. Fig. 6 represents,on an enlarged scale, a transverse section on line 3 3 Fig. 2, showing the means for supporting, actuating, and strengthening the slice-bars. Fig. 7 represents a transverse sectional view of a single slice-bar in detached position, the section being taken on a different plane from Fig. 6.

Fig. 8 represents a section on line .2 .2, Fig. 2, showing the relative positions the slice-bars assume when they are simultaneously actuated. Fig. 9 represents an end view of the grate, showing the rocking-levers and the 0 manner of assembling the head-piece or end frame, which latter is held locked in position by the key-blocks best seen in Fig. 2. Fig. 10 represents a perspective view of a slicebar in detached position. Fig. 11 represents a perspective view of a cap and its adjuncts employed for strengthening or reinforcing the slice-bar seen in Fig. 10. Fig. 12 represents a side elevation of the lower portion of a slice-bar, showing the depending lugs of the loo latter and the cap seen in Fig. 11 applied Fig. 13 represents a top plan view thereto.

of the abutting ends of the side bearing-bars seen in Figs. 4 and 5. Fig. 14 represents a side elevation of Fig. 13. Fig. 15 represents a top plan View of a slice-bar similar to the bar seen in Fig. 10, but having transverse, sinuous, or serpentine webs and openings. Fig. 16 represents a section on line m m, Fig. 6. Similar numerals and letters of reference indicate corresponding parts in the figures.

Referring to the drawings, 1 designates a shaking-grate, the same having an outer framework consisting of the side bearing-bars 2, which are preferably provided with serpentine grooves 2 ,which admit air therethrough. 3 designates the head-piece or front end frame, a similar end frame 3 being employed at the opposite extremity of the grate, each ofsaid end frames being provided with the tongues 4, which are of dovetail shape and engage similarly-shaped recesses 5 in the keyblocks 6, it being noted that. a portion of each dovetailed tongue 4 engages the similarlyshaped recess of the two adjacent keyblocks 6.

The two exterior key-blocks at either end of the grate are provided with extensions or tongues 7, which are seated in recesses 8 located at the end portions of the side bearin g-bars 2, while it will be apparent from Fig. 9 that thedovetailed tongues 7 in said figure engage the similarly-shaped grooves 9 at the ends of the side bearing-bars 2, wherefrom it will be seen that the tongues and grooves7 and 9 prevent the end frames 3 and 3 from upward or downward movement, while said end frames are prevented from endwise displacement by being interlocked with the blocks ,6, said blocks preventing such endwise movement by reason of the engagement of the tongues 7 with the grooves or pockets 8 of the side bearing-bars 2, wherefrom it will be apparent that'the entire outer framework can be readily assembled without employing bolts'or other extraneousfastening devices 'and also without necessitating the employment of' skilled labor.

'Each of thekey-blocks 6 at either end of the furnace is provided with the serrations or-teeth 8, which are adapted to coact with the extremity of the adjacent slice-bars 14, whose construction in detail will behereinaf- 'ter referred to.

9 designatesa tie-piece, which may or may not be employed, the same being best seen in Figs. 1, 2, and 3 and consisting of a suitable body portion 10, which has a rib 10 depending from the under side thereof, said tie-piece being provided with the ports 11, which are arranged in staggered order, as will be unvidedwith the V or dovetail shaped tongues 12, which are adapted to seat or interlock in similarly-shaped recesses 13 said tie-piece being thus held in position without necessitatingthe employment of bolts or other extraneous fastening devices.

The under portions 12 of the longitudinal edges of the tie-piece 9 are slightly curved or arc-shaped and are provided with serrations 13, which are adapted to coact with the opposing curved faces of the adjacent slice-bars 14, as will be explained.

Each of the slice-bars 14 consists of a body portion 15, which has a convex top 15 the extent of the latter being understood from Fig. 10.

1.6 designates ledges which extend on either side of the slice-bars below the top thereof and terminate at a point intermediate its ends, said ledges or shoulders being provided with the serrations 17, whereby a series of teeth are formed on each side of the slice-bars which crush or grind the clinkers, refuse, &c., when a set of slice-bars are operated, as will be understood from Figs. 1, 8, and 10.

18 designates aserpentine rib or web which extends longitudinally of each slice-bar, said web having on either side thereof the curved ports-19 and 20, which are separated by the solid portion 20 ports 20 being preferably of less length than said first-mentioned ports 19, although this is not essential. It will be evident that the function of the serpentine rib is to give each slice-bar the necessary strength required, so as to prevent the collapsing thereof during the act of crushing the clinkers between a pair of adjacent bars.

When two sets or rows of slice-bars are employed, as seen in Figs. 2 and 3, the juxtaposed or adjacent ends 21 of the slice-bars are substantially rectangular to the top of the slice-bar, while the opposite ends 22 of the end slice-bars are curved or arc-shaped, so as to coact with the adjacent or juxtaposed faces of either the key-blocks 6 or the tie-piece 9,. as will be understood from Fig. 8.

It will be seen from Fig. 10 that shoulders 23 and 24 are formed at each end of the slicebar, which serve to temporarily catch theclinkers, &c., and retain the same during the act of crushing or grinding the same, which occurs when said slice-bars are actuated.

25 designates lugs depending from the slicebars 14, whereby the space 27 is formed therebetween, the upper portion of said space being of polygonal shape, as indicated at 26, while the inner faces at the lower portion of said lugs are ooncaved, as indicated at 28.

29 designates caps or reinforcing devices, which are employed in conjunction with the lugs 25,-said devices consisting of a plate or disk 30, which has the cylinder 31 projecting therefrom, said cylinder having the semicircular-shaped shell or cap 32 below, which is attached to the plate and is adapted to contact with the lower or bottom surfaces 33 of the lugs 25 when the parts are assembled, as will be evident from Fig. 12, the cylinder 31 engaging the concavities 28, as is evident.

3a designates threaded openings in the cylinders 31, said openings being adapted for the reception of the screws or other fastening devices 39, which latter pass through the plates 38, whereby the caps 29 are held in position relative to the lugs 25.

The caps or reinforcing devices 29 (seen in Fig. 6) are similar in all respects to the devices 29, except that the former have the bosses 35 projecting inwardly therefrom, each of said bosses having a squared or similarshaped opening or pocket 36 therein for the reception of the rod or transmitter 37, as will be understood from Fig. 6.

4O designates bearing-bars employed, the same having the journals 41 at their extremities, which are adapted to rotate in the bearings 42 of the side bearing-bars 2, each of said bearing-bars extending transversely of the furnace and supporting a row of slice-bars thereupon, as is evident, and said bearingbars 40 serving as an axis for alternate slicebars, as will be explained.

43 designates dovetailed openings in the side bearing-bars 2, which extend from the top thereofto the point indicated in Fig. 6, said openings permitting the bearing-bars 40 to be dropped vertically into position, and ashes, clinkers, &c., being prevented from falling upon the journals 41 after the time tailed blocks 4% are inserted in place.

WVhen the construction seen in Figs. 4: and 5 is employed, in which the central or intermediate tie-piece 9 is dispensed with, I preferably use the sectional side bearing-bars seen in Figs. 4 and 5 and having the interlocking devices best seen, on an enlarged scale, in Figs. 13 and 14, it being of course understood 'that the sectional side bearing-bars are also adapted to be used with or without the central tie-piece, according to the length of grate desired. The bars on each side are made in sections 45 and 40, the section l5 having a tongue 47 projecting therefrom, said tongue being provided with a head or T-shaped extremity 48, which latter is adapted to interlock in a seat or recess 48 While the tongue 47 is seated in the recess 47 The under side of the tongue 47 and the bearin -bar 45 are provided with a recess or step formed by the junction of the walls 49 and 50, which rest upon the legs 51 of the section 46, as will be understood from Fig. 14, it being thus apparent that the tongue 47 and head 48 are supported upon said ledge, while said tongue and head are prevented from lateral displacement by means of their engagement with the similarly-shaped recesses 47 and 48 provision being thus made for readily assembling said side bearing-bars, whereby the latter can be cast in a plurality of sections according to the length of grate desired, and

eral vertical or longitudinal displacement by reason of the interlocking devices above specified.

51 designates a connecting-rod which is adapted to actuate a row of slice-bars, as will be understood, from the right-hand side of Fig. 6 and the upper portion of Fig. 3, the connecting-rod 51 being secured to the cylindrical portion 31 of the reinforcing devices 29 and thus when secured in place serving to hold said reinforcing devices in proper position relative to the lugs 25.

52 designates lugs or ears projecting from a slice-bar near the head-piece 3, as will be understood from Figs. 3 and 8, said lugs having pivotally secured therein an end of the link 53, the other end of said link being attached to the limb 54 of the bell-crank 55, which is pivotally mounted in the lugs 56, the other member 57 of said bell-crank having pivotally attached thereto the forwardly-extending link 58, which is pivoted to the operating-lever 59, the latter being pivotally mounted in the projection 61 and provided with a handle 62.

63 designates a connecting-rod which .is adapted to be secured to the cylindrical portions 31 of the reinforcing devices 29, the latter being attached to the outer row of slicebars, as will be evident from Figs. 3, 6, and 8, said connecting-rod 63 being continued beyond the lugs 25 of the front slice-bar and having attached thereto the link 64, which is pivoted to the operating-lever 65, the latter being fulcrumed at and provided with a handle 66.

67 designates a latch or locking device which is pivotally supported and has the recess 68, adapted to engage the lug or projection 69, attached to the operating-levers, as will be evident from Figs. 8 and 9.

70 designates the relative position of the boiler-shell or front head of the boiler to the grate, said shell having the bracket 71 attached thereto, whereby the movement of the operating-levers is limited, so that there is no liability of dumping the grate when shaking.

The central portion 72 of the bearing-bars 4.0 is turned cylindricahwhile the remainder of the bearing-bar -10 is of hexagonal or similar polygonal shape, so as to engage with and snugly fit the polygonal recesses 26 of the alternate slice-bars b b, as will be understood from Fig. 6, while the remaining alternate slice-bars, as indicated at a, Fig. 6, have the recess 26 Fig. 16,which is rounded, so as to rest and rock on the edges 25 of the polygonal bar 40, wherefrom it will be apparent that when the connectingrod 51 is actuated it will rock the slice-bars indicated at a, as seen in Fig. 6, the middle slice'bar having its lugs 25 engaging the transmitter 37 andthe second slice-bar a on each side of said middle bar being rocked through the medium of the bar 51 and the transmitter 37, as is evident. Likewise the four alternate slice-bars marked Z) (seen in Fig. 6) will be actuated when the connecting-rod 63 is reciprocated, since said slice-bars b fit snugly on the polygonal surfaces of the bearing-bar 40, so that it will be apparent by following out the connections seen in Figs. 3 and 8 that when the levers 59 and 65 are reciprocated in unison the adjacent slice-bars in longitudinal series rock in opposite directions and assume the position seen in Fig. 8, as will behereinafter explained.

Referring now to the mechanism for rocking the rear or right-hand set of slice-bars, (seen in Figs. 2 and 3,) it will be seen that at the rear or right-hand portion of the furnace in said figures isa connecting-rod 74, which is suitably attached either directly ,to the lugs 25 of the slice-bars or to the cylindrical portion 31 of the reinforcing devices 29, said connecting-rod 74 corresponding to the connecting-rod 51 (Seen in Fig. 8.)

75 designates a link having one end attached to the lugs 75 projecting from the under side of one of the slice-bars seen in .Fig. 3,-the other extremity of said link being other member 77 of said bellcrank having pivotally attached thereto the rod 78', which is actuated by the lever 78 as will be understood from Fig. 9, Wherefrom it will be apparent that when said rod 78 is reciprocated the slice-bars indicated at a, in the rear half of the grate will be reciprocated in substantially the same manneras the correspondingslice-bars a, (seen inFigs. 6 and 8,) the relative position and manner of attachment of the bell-crank 76 to the bottom of the contiguous slice-bar and to the rib 10 being substantially identical to thestructure seen at the left of Fig. 8, wherethe manner of operating the slice-bars, &c., is clearly shown, the slice-bars bat the right of Fig. 3 corresponding to and being actuated in the same manner as thebars b in Figs. 6 and 8,

.as isevident.

The connecting-rod 79 corresponds to the rod 63 (seen in Fig. 8) and is suitably attached to the lugs or reinforcing devices of the adjacent series of slice-bars b and is extended beyond the same, as will be seen ,at the right of Fig. 3, and has the operating-rod 8O pivotally attached thereto, wherefrom it will be apparent that the simultaneous reciprocation of the rods or links 78 and 80 will perform substantially the same function as the simultaneous-reciprocation of the rods ,or links 58 and 64, (seenin Fig. 8,) the rear or right-hand ;ash as already been explained.

mentof the tie-piece 9 at or near the center of the grate a transverse dead-spot may exist, which under certain circumstances is objectionable.

When it is desired or expedient to dispense with the tie-piece 9, I insert two or more transverse rows of slice-bars in its place, as will be understood from Fig. 5 and also from the bottom plan View of Fig. 4, this being the construction in which I preferably employ the sectional side bars seen in Figs. 13 and 14. The principle of the invention is identical in Figs. 4 and 5 with the principle illustrated in detail in Figs. 2, 3, 6, and 8, the slice-bars being actuated in opposite directions simultaneously or independently and supported and locked in substantially the same manner It may, however, in some instances be desirable to employ the specific actuating means for the slicebars seen in Figs.4 and 5, in which 81 designates a reciprocating connecting-rod, which has one end attached to the member 82 of the bell-crank 83, which latter is mounted on the rock-shaft 82*, which has its bearings in the lugs 84. At one side of the furnace, as the lower righthand side of Fig. 4, the member of the bell-crank 83 has a link 86 connected with the lug 87 of the contiguous slice-bar, while the opposite extremity of the rock-shaft has an arm85 which has a link 86 pivoted thereto, said link being attached to the lug 87 of the adjacent slice-bar, three of the slice-bars, in

longitudinal series, being connected by means of a rod 87, which corresponds to the rod 51 in Figs. 6 and 8, so that when the rock-shaft 82 is actuated by reason of the intermediate connections to the slice-bars a the latter in longitudinal series will rock in unisonand independently of or in unison with the adjacent longitudinal series I), as will be understood from Figs. 4and 6, the general arrangement of the relative position of the parts being understood from the construction seen at the right of Figs. 4 and 5, although itwill of course be apparent that I do not desire to be limited thereto in every instance.

The slice-bars b, which correspond to the bars I), (seen in Figs. 6 and 8,) are connected by means of the link or rod 88, which corresponds to the rod 63, said rod 88 being pivotallyattached to-the lugs 25 or the reinforcing devices 29 of the adjacent slice-bars and having the connection 89 pivotally attached thereto, by means of which the slice-bars b at the rear or right-hand portion of the furhaving the rod or link 91 pivoted thereto, whereby the slice-bars b, which alternate with the bars a and are arranged in longitudinal series at the front or left-hand portion of the furnace, can be operated in unison, said bars I) being fitted snugly on the hexagonal or polygonal bars 40, as already explained with reference to Fig. 6.

92 designates a connecting-rod which is attached to the lugs or reinforcing devices of the slice-bars a, so that the latter are actuated in unison, the rod 92 corresponding to the rod 51 (Seen in Fig. 8.)

93 designates a link which is pivotally attached to the lug 94 of one of the forward slice-bars, said link being pivotally attached to the member 95 of the bell-crank 96, which is fulcrumed on the lug 97, the member 98 of said bell-crank having the rod 99 attached thereto, by which the slice-bars in connection therewith are actuated.

It willbe apparent that for the sake of clearness of illustration I have omitted from Fig. 5 some of the links, connecting-rods, &c., seen in Fig. 4., and vice versa; but it is thought that from the foregoing explanation, taken in connection with the detailed structure hereinbefore described, the operation of the slice-bars seen in Figs. 4 and 5 will be clearly understood. It will be understood that although I have shown seven slice-bars mounted on the transverse bearing-bars I need not be limited thereto in every instance, since the number of slice-bars is of course dependent upon the width of the furnace. It will also be noted that the lugs 25 of the two slice-bars b on either side of the central bar a are shortened, so as to clear the transmitter 37, all of the slice-bars being held at the properdistance apart by any suitable means. It will be apparent that the ports 11 may open at their lower extremities into the ashpit at either side of the web 10 as indicated in Fig. 8, and may discharge through the tiepiece either as indicated in Figs. 1 and 2 or as in said Fig. 8.

The grate may be supported on feet, as indicated in Fig. l, or it may rest upon hoops, brackets, or similar devices, as is evident.

In Fig. 3 I have shown a different manner of applying the transmitter 37 from that seen in Figs. 6 and 8; but it will be apparent that the principle and function of said transmitter are the same in each instance. It will also be evident that, if desired, I may insert longitudinal stationary bars between the slice bars.

The operation is as follows, the manner of looking or assembling the outer framework of the grate being first described: Referring first to Figs. 2 and 9, the side bearing-bars are first arranged in substantially the position seen, after which the head-pieces or end frames 3 and 3 are inserted in position, the dovetailed tongues and grooves common to said end frames and side bars interlocking, as shown in Figs. 1 and 9, it being of course understood that the rear end frame 3 also interlocks with the side bars in substantially the same manner as indicated in Fig. 9. The key-blocks 6 are next dropped into the position seen in Fig. 2, as is also the tie-piece 9, the latter being held in position by reason of the dovetail shaped tongues and grooves, wherefrom it will be apparent that the entire framework can be assembled without necessitatingthe employmentof bolts or other extraneous fastening devices. The wedge-shaped blocks or keys 4st having been removed, the oscillatory bearing-bars 40 are dropped into the position indicated in Fig. 6. The slicebars are now placed in the position indicated in Fig. 6, the end slice bars Z) being first dropped into place and moved to the position indicated next to the side bars 2 and then the adjacent slice-bars a, which it will of course,

be understood are constructed as seen in Fig. 16, so as to allow of rotation independent from the transverse bearing-bar 42, after which the intermediate slice-bars b and the central bar a are placed in position, it being of course understood that all the slice-bars b have the polygonal recesses 26, which engage snugly with the polygonal bearing-bar 40, so that the latter and the slice-bars b oscillate in unison, while the slice-bars at, having curved instead of polygonal recesses, can be oscillated on the knife-edges 25 of the polygonal bar 40, independently thereof, when desired. Prior to the placing in position of the three central slice-bars a and b I) (seen in Fig. 6) the transmitter 37 is dropped into the pockets or recesses 36, the reinforcing devices or caps 29 and 29, having been placed in position, it being noted that the lugs 25 of the central slice-bar to engage the transmitter 37, which is preferably square, whereby all the slice bars a rock in unison. The reinforcing devices 29 and 29 (seen at the left of Fig. 6) are held in position by the plates 38 and the screws 39, while the reinforcing devices at the right of said figure are held in position by the connecting-rods 51 and 63 and their respective fastening devices.

The manner of making the connection between the respective links, bell-cranks, connecting-rods, and operating-levers has already been fully explained and it is thought will require no further description.

When it is desired to dispense with the central tie-piece 9, the construction seen in Figs. 4 and 5 is employed, in which latter case it will be apparent that there is positively no dead-surface at any point of the grate, and attention is also directed to the fact that in all the constructions shown the grate-surface is normally always substantially on a level, as will be understood from Figs. 5 and 6.

When it is desired to shake the grate, the

levers 65 and 59 are operatedin unison, Wherefrom by following out the various connec tions it will be apparent that the front sections of the grate will assume the position seen at the left of Figs. 1 and 8. If it should be desired to rock the rear sections into the position indicated in Fig. 8, it is only necessary to impart a similar movement,as above described, to the levers seen at the left of Fig. 9.

If it is desired to rock one longitudinal series of a grate-section or slice-bar, it is only necessary to lock one of the levers seen in Figs. 8 and 9 by means of the latch 67 and actuate the other lever, whereupon the parts will assume the position as seen at the right of Fig. 1, the desired longitudinal series of slice-bars being oscillated, while the alternate longitudinal series of slice-bars remain substantially horizontal and serve for the time being as dead-bars.

The grate is prevented from being dumped by means of the stop 71, (seen in Fig. 8,) but of course any other equivalent device may be employed.

It will thus be seen from the foregoing that by reason of the links, connecting-rods, and their adjuncts I am enabled to impart three different movements to the different gratesections, the first position being as shown in Fig. 8- or at the left of Fig. l, the second position being indicated at the right of said Fig. 1, while the third position is that in which all the slice-bars by the proper manipulation of the operating-levers may be caused to slant or incline in the same direction, as is evident, in which latter position the grate may be dumped.

It will of course be evident that I need not limit myself in every instance in the construction of the slice-bars to the longitudinallyextending serpentine grooves seen in Fig. 10, since I may, if desired, employ the slicebar 14 as seen in Fig. 15, the appearance of the same in plan view being indicated in said figure, said bar having transverse sinuous ports or passages 21 therein, but being constructed in all other respects similar to the bars seen in Figs. 10 and 16.

It will be evident that the position of the tongues and grooves common to the side bearing-bars and end frames may be transposed without departing from the spirit of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a grate, an outer frame, the same consisting of side bearing-bars, each having near its ends downwardly-extending pockets, and in their .ends inwardly-extending recesses, the latter being at an angle to said pockets, and head-pieces or end frames having tongues engaging said recesses, said frames having inwardly-extendin g tongues thereon, in combination with key-blocks having tongues and recesses, said last-mentioned tongues being adapted to engage and interlock with the pockets of the adjacent side bearing-bars, and said last-mentioned recesses being adapted to engage and interlock with the tongues of the adjacent end frame.

2. In a grate, an outer frame consisting of side bearing-bars, having in their ends the dovetailed recesses 9 and pockets 8 headpieces or end frames having the dovetailed tongues 7 adapted to engage said recesses, and a series of key-blocks 6, said blocks having dovetail-shaped recesses therein, adapted to engage dovetailed tongues on said end frames and the end key-blocks having tongues adapted to seat in said pockets.

3. In a grate, an outer frame consisting of side bearing-bars, having in their ends, the dovetailed recesses 9 and pockets 8 headpieces or end frames having the dovetailed tongues 7 X adapted to engage said recesses, and a series of key-blocks 6, said blocks having dovetail-shaped recesses therein, adapted to en gage dovetail tongues on said end frames, the end key-blocks having tongues 7 adapted to seat in they pockets in said side bearingbars, in combination with an intermediate tiepiece, and dovetail tongues and grooves common to said tie-piece and side bearing-bars.

4:. In a grate, a slice-bar, consisting of a suitable body portion havinga convex top and serrations at the side thereof, said serrations terminating below said top, a sinuous or serpentine strengthening-web having similarlyshaped ports on either side thereof and extending through the body of said slice-bar and lugs depending from the latter, a bearin g-bar and connections common to said bearing-bar and slice-bar, whereby said slice-bar is adapted to be actuated by said bearing-bar.

5. In a grate, a slice-bar consisting of a suitable body portion,l1avin g a conveXtop and a strengthening-web, locatedin said body portion, thereby forming ports on either side of said Web, serrations in the sides of said slicebar terminatingbelow the top thereof, shoulders located near the ends of the bars, andlugs depending from said body portion and having a space therebetween, the upper portion of said space being of polygonal shape, and the lower portion of said lugs being concave or recessed and adapted to receive a reinforcing device.

6. In a grate, aslice-bar consisting of a suitable body portion, a serpentine web located thereon, serpentine ports located on either side of said Web and extending through said body portion, serrations or teeth on the sides of said body portion, said serrations terminating below the top of the bar and lugs projecting from said body portion and having a space therebetween, the upper portion of said space being of polygonal shape and the lower portion of the space between said lugs being concaved and adapted to receive a reinforcing device.

7. In a grate, a reinforcing device, the same consisting of a disk or plate 30, having the cylinder 31 projecting laterally therefrom, said disk being provided with a curved, hemispherical shell or cap projecting therefrom, in proximity to said cylinder, in combination with a slice-bar, lugs projecting from said bar and adapted to receive the reinforcing device, and fastening devices common to said lugs and reinforcing device.

S. In a shaking-grate, side bars, transversely-extending bearing-bars, having bearings in said side bars, said transverse bars being cylindrical at their intermediate portion and of polygonal shape in cross-section adjacent thereto, a plurality of slice bars mounted upon said transverse bars, every alternate slice bar fitting snugly on said transverse bar, and adapted to move in unison therewith, while the other alternate slicebars are capable of independent movement relative to said transverse bars, and means for actuating said slice-bars.

9. In a shaking-grate, side bars, a plurality of transverse bearing-bars,a plurality of slicebars mounted on said transverse bars, every alternate slice-bar fitting snugly upon said transverse bar and moving in unison therewith, and the intermediate slice-bars being capable of independent movement relative to said transverse bars, reinforcing devices mounted upon each outer pairof slice-bars, the inner pair of said reinforcing devices having the ends of a rod or transmitter seated therein, the latter engaging the depending lugs of the central slice-bar and means for actuating the alternate longitudinal series of said slicebars independently or in unison.

10. Ina grate, side bearing-bars, endframcs interlocked therewith, transverse bearingbars each having two longitudinal series of slice-bars mounted thereon, the slice-bars of one series alternating with those of the other series, and means for actuating each of said longitudinal series, so that each pair of adjacent slice-bars may rock in opposite direction to its neighbor, independently of its neighbor, or can remain stationary thus serving as a dead-bar during the oscillation of itsneighbor.

11. In a shaking-grate, a plurality of side bars, transverse end frames, therefor, transverse bearing bars, a plurality of longitudinal series of slice-bars mounted on each of said transverse bars, the slice-bars of one series, alternating with those of the other series one set of slice-bars in longitudinal series, having a connecting-rod common thereto, a link pivoted to one of the last-mentioned series of slice-bars, and a bell-crank having a member suitably fulcrumed and pivoted to said link, the other member of said bell-crank having means attached thereto for actuating the same, in combination wit-h a connecting-rod common to the links of another series of said slice-bars, a link pivotally attached to said connecting-rod, and means for enabling each of the longitudinal series of said slice-bars to be operated independently or in unison.

12. In a grate, an outer framework, consisting of side bearing-bars, one of said side bars having a tongue projecting therefrom,

and a head 011 the end of said tongue, said tongue and head being adapted to seat in similarly-shaped recesses in a contiguous bar, a ledge projecting from the recessed bar and adapted to support the bar or section, provided with said tongue and head, said latter bar having its under portion cutaway for the reception of said ledge, and the parts of the frame being loosely connected whereby expansion is permitted and displacement of said bars is prevented.

13. In a grate, an outer framework consisting of side bearing-bars and end frames, interlocking devices common thereto, said side bearing-bars being made in sections, one of said sections having the tongue 47 and head 48 adapted to seat in a similarly-shaped recess in a contiguous section and said firstmentioned bar having a cut-out portion formed by the walls 49 and 50, said cut-out portion being supported on the ledge 51 of said recessed section, said sections being loosely connected whereby expansion is permitted and displacement of said bars is prevented.

let. 111 a shaking-grate, a plurality of side bars, end frames and interlocking devices therefor, a series of transverse bearing-bars, each of the latter having two series of slicebars carried thereon, the slice-bars of one series alternating with those of the other series, means for enabling each of the two series of said slice-bars to be independently operated so as to move either in the same direction or in opposite directions, and locking devices for said actuating means.

15. In a grate, transverse bearingbars, suitably supported, a plurality of slice-bars mounted thereupon, every alternate slice-bar rocking in unison with its bearing-bar, and the other slice-bars rocking on said bearingbar as an axis, the slice-bars adjacent to the central slice-bar having shortened lugs, a transmitter suitably supported, the lugs of said central bar engaging said transmitter, and means for actuating said slice-bars.

16. In a grate, the combination of bearingbars suitably supported, two series of slicebars carried on each of said bearing-bars, the slice-bars of one series alternating with those of the other series, and means by which the slice-bars of the two series may be rocked in the same direction or in opposite directions.

17. In a grate, the combination of bearingbars suitably supported, two series of slicebars carried on-each of said bearing-bars, the slice-bars of one series alternating with those of the other series, lugs projecting from said slice-bars and provided with reinforcing devices and connections common to said reinforcing devices in combination with means by which the slice-bars of the two series may ternate slice-bar rocking in unison with its bearing-bar and the other slice-bars mounted on the latter, rocking on said bearing-bar as an axis, the slice-bars adjacent the central slice-bar having shortened lugs, reinforcing devices secured to the outer pair of slice-bars at each side of the grate, a transmitter having its ends seated in the inner pair of reinforcing devices and engaging the lugs of the central slice-bar, and actuating means attached to said reinforcing devices.

19. In a grate, a reinforcing device, the same consisting of a plate, having a cylinder or member projecting laterally therefrom, and a curved cap projecting from said plate in proximity to said member, in combination With a slice-bar having lugs depending therefrom, the inner lower faces of said lugs being recessed for the reception of said member,

while the lower extremities of said lugs are curved to conform to the inner surface of said cap, an actuating-bar adapted to be secured to said laterally-projecting member of the reinforcing device and fastening means common to said bar and member.

20. In a grate, an oscillating slice-bar, consisting of a suitable body portion having a convex top, solid end portions, and serrations at the sides of said body portion, said serrations terminating below said top, a strengthening-web located within the sides and ends of said body portion, thereby forming ports extending through said slice-bar, and lugs depending from the latter.

GEORGE A. GUMPHERT.

Witnesses:

JOHN A. WIEDERSHEIM, E. HAYWARD FAIRBANKS. 

